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Perfect Vaccination 6 marker

1. Vaccines are dead/inactive forms of the pathogen which are injected into the body to stimulate an immune response
2. Lymphocytes produce specific antibodies to bind to the antigens on the pathogen to flag them up for phagocytosis
3. Phagocytes engulf and destroy the pathogen
4. Body turns some lymphocytes into memory cells that remain in the blood long-term.
5. Upon re-infection, memory cells recognize it immediately and produce a larger, more rapid production of specific antibodies
6. The pathogen is destroyed by white blood cells before it can cause disease symptoms. </aside>

🧠 Exam-style questions

• Why should a large percentage of the population be vaccinated?
• Explain how the immune systems of farm animals respond to a vaccination and how that prevents an outbreak of food poisoning in humans (4)